<template>
	<view class="cart-container" v-if="cart.length !== 0">
    <my-address></my-address>
		<view class="cart-title">
		  <!-- 左侧图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文本 -->
      <text class="cart-title-text">购物车</text>
		</view>
    
    <!-- 商品列表区域 -->
    <!-- uni-swipe-action 是最外层包裹性质的容器 -->
    <uni-swipe-action>
      <block v-for="(goods, i) in cart" :key="i">
        <!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
        <uni-swipe-action-item :options="options" @click="swipeActionClickHandler(goods)">
          <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    <!-- 结算区域 -->
    <my-settle></my-settle>
	</view>
  
  <!-- 空白购物车区域 -->
    <view class="empty-cart" v-else>
      <image src="/static/cart_empty@2x.png" class="empty-img"></image>
      <text class="tip-text">空空如也~</text>
    </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  import {mapState,mapMutations} from 'vuex'
	export default {
    mixins:[badgeMix],
    computed:{
      ...mapState('m_cart',['cart']),
    },
		data() {
			return {
        options:[{
          text:'删除',
          style:{
            backgroundColor:'#C00000'
          }
        }]
      };
		},
    methods:{
      ...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
      radioChangeHandler(e) {
          console.log(e);// 输出得到的数据 -> {goods_id: 395, goods_state: false}
          this.updateGoodsState(e);
      },
      // 商品的数量发生了变化
      numberChangeHandler(e) {
        console.log(e);
        this.updateGoodsCount(e);
      },
      // 点击了滑动操作按钮
      swipeActionClickHandler(goods) {
        this.removeGoodsById(goods.goods_id)
      },
    }
	}
</script>

<style lang="scss">
  .cart-container {
    padding-bottom: 50px;
  }
  .cart-title{
    height: 40px;
    display: flex;
    align-items: center;
    font-size: 14px;
    padding-left: 5px;
    border-bottom: 1px solid #efefef;
    .cart-title-text{
      margin-left: 10px;
    }
  }
  .goods-item {
    // 让 goods-item 项占满整个屏幕的宽度
    width: 750rpx;
    // 设置盒模型为 border-box
    box-sizing: border-box;
    display: flex;
    padding: 10px 5px;
    border-bottom: 1px solid #f0f0f0;
  }
  .empty-cart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 150px;
  
    .empty-img {
      width: 90px;
      height: 90px;
    }
  
    .tip-text {
      font-size: 12px;
      color: gray;
      margin-top: 15px;
    }
  }
</style>
